180 Dr. Wilh. Giesbrecht on 
Anterior segments of abdomen laterally angulated. Furca 
scarcely longer than broad. Anterior antenna in both sexes 
16-jointed. Tube of siphon reaches to near end of thorax. 
Distr. Yorkshire ; Triest; Naples. 
Subfamily 2. Dyspowrizw, nov. 
Anterior antenne of 2 8-12-jointed; esthetask on the 
last joint; clasping-antenne of ¢ 10- or 11-jointed, with 
thirteen additional esthetasks. Mandible without palp, -con- 
sisting only of the stilet. The two lobes of maxilla stiff, each 
bearing one or two, rarely (Parartrogus) three and five sete. 
Last joint of outer branch of third and fourth feet with five 
sete on the inner margin. Abdomenof 2 4-, of ¢ 5-jointed ; 
thoracic segments rarely rounded off laterally ; usually pro- 
duced into lateral processes, conspicuous in dorsal view. 
Siphon with suctorial tube (except Parartrogus). Inner branch 
of fourth foot either as in preceding feet, or 3-jointed, with 
rudimentary sete, or 2-jointed, or wanting, Terminal joint 
of fifth foot small, oblong or knob-like. 
Genus 8. Pararrroaus, Th. & A. Scott, 1893. 
@. Thoracic segments laterally rounded off. Anterior 
part of genital segment scarcely broader than posterior. 
Anterior antenne 9-jointed. Posterior antenne 4-}ointed. 
Siphon ‘rudimentary ” (without tube ?). Lobes of maxilla 
short, one with three spines and two sete, the other (much 
smaller) with two sete. Both branches of first foot and inner 
branch of fourth foot 2-jointed, latter with plumose sete. 
Terminal joint of fifth foot oblong. 
14, Parartrogus Richardi, Th. & A. Scott. 
Parartrogus Richardi, Th. & A. Scott, Ann. & Mag. Nat. Hist. ser. 6, 
vol. xi. p. 210, t. vii.; Th. Scott, Eleventh Rep. Fish. Board Scot- 
land, p. 210, t. iv. 
Distr. Firth of Forth. 
this genus, because (1) the authors describe the exopodite of the posterior 
antenna as “very small”; (2) they find the anterior antenne 17-jointed 
(althcugh the zsthetask-bearing joint is followed by only one joint), and 
only three sete on the terminal joint of the fifth foot; (3) they do not 
mention the large plumose seta of the mandible-palp. I cannot identify 
the genus to which the species belongs, in the absence of any notice of 
the mandible-palp. Another species, described by G. M. Thomson 
(Trans. N. Zeal. Inst. vol. xv. p. 112, t. xi.) as Artotrogus ovatus, seems to 
be related to Acontiophorus, the exopodite of posterior antenns having 
the same proportional length ; but the species differs from this genus in 
the absence of a suctorial tube and in the number (8 or 9) of joints in the 
anterior antennie. 
